Fire Prevention and Control Technology with Inhibition Inertia Foam to Prevent Coal Spontaneous Combustion in High Ground Temperature Deep Mine

In order to prevent coal spontaneous combustion occurred in a high ground temperature deep mine, the paper provided a fire prevention and contral tec hnology with injected inhibition inertia foams and introduced the composition and fire prevention and control mechanism of the inhibition inertia foam. With the program med temperature rising, the paper compared and analyzed variation conditions of CO production rate and oxygen consumption ratio before and after the coal sample W as treated in inhibition inertia foam solution. A site industrial test was conducted. With preset beam tubes applied to collect gas in the treated area, the variation of CO C oncentration was analyzed.The results showed that the accelerated oxidation critical temperature of raw coal sample was 60 °C and after treatment, the accelerated oxi dation critical temperature of the coal sample was 110。C. When the coal temperature was over 174。C predicted with a ftting formula, the oxidation of the coal sample after treated would be higher than raw coal sample and could reduced the CO production in goaf within a stable foam period. Therefore, the inhibition inertia foam could well prolong the time of coal spontaneous combustion to chemical adsorption stage and would obvious advantages to prevent spontaneous combustion disaster occurre d in the goaf of deep mine with high ground temperature.